Tree Replacement Requirements: Altadena vs Norwalk
How do tree replacement requirements rules compare between Altadena, CA and Norwalk, CA?
Altadena and Norwalk have similar restriction levels.
Altadena, CA
Los Angeles County
The LA County Oak Tree Permit Ordinance encourages replanting and propagation of oak trees. When oak tree removal is approved, replacement planting conditions may be imposed. LA County Planning is updating the ordinance to further encourage planting new oak trees and redesigning projects to preserve existing trees.
View full Altadena rules →Norwalk, CA
Los Angeles County
Norwalk requires replacement planting when permitted trees are removed. Replacement ratios and species specifications ensure canopy preservation.
View full Norwalk rules →Key Facts Comparison
| Fact | Altadena | Norwalk |
|---|---|---|
| Replacement | May be required as permit condition | - |
| Ordinance Update | In progress, more replanting focus | - |
| Propagation | Encouraged by county program | - |
| Oak Woodlands | Conservation management plan applies | - |
| Ratio | - | 1:1 to 3:1 replacement |
| Minimum Size | - | 1.5 to 2 inch caliper |
| Species | - | Approved native/adapted list |
| Alternative | - | Fee-in-lieu to tree fund |
Highlighted rows indicate differences between cities.
Altadena FAQ
How many replacement trees are required for oak removal?
Typically 2:1 to 10:1 ratio depending on the removed tree's size, health, and significance. Unauthorized removal is penalized at the highest replacement ratios. The Department of Regional Planning sets the exact ratio.
What species can I plant as replacements?
The same species as the removed tree or another approved native oak species (coast live oak, valley oak, interior live oak, canyon live oak). Replacement trees must be at least 15-gallon container size.
How long do I have to maintain replacement trees?
A minimum 5-year maintenance and monitoring period with annual reports to the Department of Regional Planning. Failed trees must be replanted. Irrigation must be provided during the establishment period.
Norwalk FAQ
How many trees must I plant as replacement?
Typically 1 to 3 replacement trees per removed tree depending on size. Check Norwalk tree ordinance for ratios.
Can I pay a fee instead of planting?
Many cities offer a fee-in-lieu option that funds the city tree planting program.
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